When this picture was posted in eFluids gallery in Nov. 2000, the location of this dam was not known. However, one of the eFluids user (Dr. Nehemias Lacerda of Brazil, Dec. 8, 2001) identified it as Itaipu Dam, and provided the following details. Volume at maximum normal level is 30 giga cubic meters, maximum width = 12 km, surface (maximum operating level) 1460 km^2, and present power output = 12.6 Giga Watts.